Settlement control structure based on shield underneath pass foundation

Abstract

The utility model discloses a settlement control structure based on a shield underneath pass foundation, which comprises an underneath pass pipeline, a plurality of annular support mechanisms are mounted on the inner side of the underneath pass pipeline, and two support monitoring mechanisms are mounted at the bottom end of each annular support mechanism. The upper end of each annular supporting mechanism is provided with two tensioning anti-deviation mechanisms, the two tensioning anti-deviation mechanisms and the supporting monitoring mechanism are symmetrically installed relative to the annular supporting mechanisms, each annular supporting mechanism comprises a supporting ring, and the bottom end of each supporting ring is fixedly provided with a plugging head; an arc-shaped separation strip is mounted below the plugging head; the supporting monitoring mechanism comprises inclined supporting legs, mounting channels are formed in the inner sides of the inclined supporting legs, and mounting sleeves are mounted on the inner sides of the bottom ends of the mounting channels. The soil layer at the bottom of the shield underpass foundation is subjected to grouting hardening, sedimentation can be effectively avoided, and the stability of the underpass foundation can be conveniently kept.

Description

A settlement control structure based on shield tunneling foundation Technical Field

[0001] This utility model relates to the field of shield tunneling settlement technology, specifically a settlement control structure based on a shield tunneling foundation. Background Technology

[0002] Shield tunneling settlement occurs during shield tunneling construction when the tunneling machine's excavation, soil disturbance, and grouting activities cause a redistribution of ground stress, leading to ground settlement. This settlement can then subject existing pipelines to additional stress and deformation, potentially causing pipeline rupture, leaks, excessive deformation, and other problems. This can severely impact the normal operation of pipelines and even lead to safety accidents. Therefore, settlement control is crucial during the construction of the foundation beneath the tunnel.

[0003] The existing method of using a foundation for shield tunneling to pass under the shield is too close to the shield, making it easy for settlement to cause deformation of the shield. Conventional support methods for settlement control are also costly. Therefore, this method does not meet the current requirements. To address this, we propose a settlement control structure based on the foundation for shield tunneling to pass under the shield. Summary of the Invention

[0004] The purpose of this utility model is to provide a settlement control structure based on a shield tunneling foundation, in order to solve the problem mentioned in the background art that the existing shield tunneling foundation is too close to the shield, making it easy for settlement to cause deformation of the shield, and the conventional support method for settlement control is costly.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a settlement control structure based on a shield tunnel foundation, comprising a tunneling pipe, wherein multiple annular support mechanisms are installed on the inner side of the tunneling pipe, each annular support mechanism has two support monitoring mechanisms installed at its bottom end, and each annular support mechanism has two tensioning and anti-deviation mechanisms installed at its upper end, wherein the two tensioning and anti-deviation mechanisms and the support monitoring mechanisms are symmetrically installed relative to the annular support mechanism, the annular support mechanism includes a support ring, a sealing head is fixedly installed at the bottom end of the support ring, and an arc-shaped dividing strip is installed below the sealing head;

[0006] The support monitoring mechanism includes an inclined support leg, an installation channel is provided on the inner side of the inclined support leg, an installation sleeve is installed on the inner side of the bottom end of the installation channel, a pressure sensor is installed on the inner side of the installation sleeve, and a transmission head is installed on the lower end face of the pressure sensor.

[0007] Preferably, the plurality of ring support mechanisms are arranged linearly along the axis of the underpass pipe, the underpass pipe is fixedly connected to the plurality of support rings, both ends of the arc-shaped separator are fixedly connected to two adjacent inclined support legs, and a grouting cavity is provided between the bottom end of the support ring and the arc-shaped separator.

[0008] Preferably, the tensioning and anti-deviation mechanism includes a sealing plate, and a plurality of anchor rods are installed on one side of the sealing plate. Each anchor rod consists of a rod body and a plurality of limiting rings.

[0009] Preferably, the plurality of limiting rings are fixedly fitted on the outer side of the upper end of the rod, the bottom end of the rod passes through the lower pipe and the support ring and is in contact with the sealing plate, the rod and the support ring are fixedly connected by the sealing plate, and the plurality of limiting rings are arranged linearly along the axis of the rod.

[0010] Preferably, the inclined support leg is fixedly connected to the support ring, the inclined support leg is threadedly connected to the mounting sleeve, the bottom end of the pressure sensor is provided with a contact, the upper end of the transmission head passes through the mounting sleeve and is fixedly connected to the contact, and a sealing ring is provided between the transmission head and the mounting sleeve.

[0011] Compared with the prior art, the beneficial effects of this utility model are:

[0012] 1. This utility model installs multiple linearly arranged annular support mechanisms on the inner side of the underpass pipe. The annular support mechanisms facilitate the installation of two symmetrically installed tensioning and anti-deviation mechanisms and support monitoring mechanisms. Multiple anchor rods, supported by the sealing plate, penetrate the support rings and the underpass pipe and insert into the soil layer. Multiple limiting rings fixedly fitted at the upper end of the rod can maintain the rod's tightness between the underpass pipe and the soil layer. At the same time, the multiple anchor rods in the two tensioning and anti-deviation mechanisms can effectively prevent the underpass pipe from deflecting.

[0013] 2. This utility model has a grouting cavity between the support ring and the arc-shaped partition strip. Two inclined support legs are inserted to both ends of the arc-shaped partition strip, so that the support ring can be effectively supported by the two inclined support legs. At the same time, grouting is performed in the grouting cavity and sealed by the sealing head to achieve the hardening of the soil layer at the bottom of the support ring. Thus, after grouting, the support ring can effectively avoid settlement by the two inclined support legs. Under the protection of the installation sleeve, the pressure sensor can monitor the settlement of the underground pipeline in real time through the transmission head. Attached Figure Description

[0014] Figure 1 is a schematic diagram of the overall structure of this utility model;

[0015] Figure 2 is a schematic cross-sectional view of the overall structure of this utility model;

[0016] Figure 3 is a structural schematic diagram of the ring support mechanism of this utility model;

[0017] Figure 4 is a cross-sectional structural diagram of region A in Figure 3 of this utility model.

[0018] In the diagram: 1. Underpass pipe; 2. Circular support mechanism; 201. Support ring; 202. Arc-shaped separator; 203. Sealing head; 3. Tensioning and anti-deviation mechanism; 301. Sealing plate; 302. Anchor bolt; 303. Rod body; 304. Limiting ring; 4. Support monitoring mechanism; 401. Angled support leg; 402. Installation channel; 403. Installation sleeve; 404. Pressure sensor; 405. Transmission head. Detailed Implementation

[0019] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0020] Please refer to Figures 1 to 3. One embodiment of this utility model is a settlement control structure based on a shield tunnel foundation, including a tunneling pipe 1. Multiple annular support mechanisms 2 are installed on the inner side of the tunneling pipe 1. The multiple annular support mechanisms 2 are arranged linearly along the axis of the tunneling pipe 1. Each annular support mechanism 2 includes a support ring 201. The tunneling pipe 1 is fixedly connected to the multiple support rings 201. A sealing head 203 is fixedly installed at the bottom end of the support ring 201. An arc-shaped partition strip 202 is installed below the sealing head 203. A grouting cavity is provided between the bottom end of the support ring 201 and the arc-shaped partition strip 202. Grouting is performed in the grouting cavity and sealed by the sealing head 203 to achieve soil hardening at the bottom of the support ring 201.

[0021] Please refer to Figures 2 to 4. Each annular support mechanism 2 has two support monitoring mechanisms 4 installed at its bottom end, and two tensioning and anti-deviation mechanisms 3 installed at its upper end. The tensioning and anti-deviation mechanisms 3 and the support monitoring mechanisms 4 are symmetrically installed relative to the annular support mechanism 2. Each support monitoring mechanism 4 includes an inclined support leg 401. The two ends of the arc-shaped separator 202 are fixedly connected to two adjacent inclined support legs 401. The inclined support leg 401 is fixedly connected to the support ring 201. An installation channel 402 is provided on the inner side of the inclined support leg 401. An installation sleeve 403 is installed on the inner side of the bottom end of the installation channel 402. The support leg 401 is connected to the mounting sleeve 403 by threads. A pressure sensor 404 is installed inside the mounting sleeve 403. A transmission head 405 is installed on the lower end face of the pressure sensor 404. A contact is provided at the bottom end of the pressure sensor 404. The upper end of the transmission head 405 passes through the mounting sleeve 403 and is fixedly connected to the contact. A sealing ring is provided between the transmission head 405 and the mounting sleeve 403. After grouting, the support ring 201 can effectively avoid settlement through the two inclined support legs 401. Under the protection of the mounting sleeve 403, the pressure sensor 404 can monitor the settlement of the underpass pipe 1 in real time through the transmission head 405.

[0022] Please refer to Figures 2 and 3. The tensioning and anti-deviation mechanism 3 includes a sealing plate 301. Multiple anchor rods 302 are installed on one side of the sealing plate 301. Each anchor rod 302 consists of a rod body 303 and multiple limiting rings 304. The multiple limiting rings 304 are fixedly fitted on the outer side of the upper end of the rod body 303. The bottom end of the rod body 303 passes through the lower pipe 1 and the support ring 201 and is in close contact with the sealing plate 301. The rod body 303 and the support ring 201 are fixedly connected through the sealing plate 301. The multiple limiting rings 304 are arranged linearly along the axis of the rod body 303. The multiple anchor rods 302 in the two tensioning and anti-deviation mechanisms 3 can effectively prevent the lower pipe 1 from deflecting.

[0023] In summary, when controlling the settlement of the shield tunnel foundation, a tunneling pipe 1 is installed under the shield tunnel, allowing multiple linearly arranged annular support mechanisms 2 to be installed on the inner side of the tunneling pipe 1. The annular support mechanisms 2 facilitate the installation of two symmetrically installed tensioning and anti-deviation mechanisms 3 and support monitoring mechanisms 4. Multiple anchor rods 302, supported by the sealing plate 301, penetrate the support ring 201 and the tunneling pipe 1 and are inserted into the soil. Multiple limiting rings 304 fixedly fitted at the upper end of the rod 303 can maintain the tightness of the rod 303 to the tunneling pipe 1 and the soil. At the same time, the multiple anchor rods 302 in the two tensioning and anti-deviation mechanisms 3 can effectively prevent the tunneling pipe 1 from deflecting.

[0024] A grouting cavity is provided between the support ring 201 and the arc-shaped partition strip 202. Two inclined support legs 401 are inserted into both ends of the arc-shaped partition strip 202, so that the support ring 201 can be effectively supported by the two inclined support legs 401. At the same time, grouting is performed in the grouting cavity and sealed by the sealing head 203 to achieve the hardening of the soil layer at the bottom of the support ring 201. Thus, after grouting, the support ring 201 can effectively avoid settlement by the two inclined support legs 401. Under the protection of the installation sleeve 403, the pressure sensor 404 can monitor the settlement of the underpass pipe 1 in real time through the transmission head 405.

[0025] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

Claims

1. A settlement control structure based on a shield tunnel foundation, comprising an underpass pipe (1), characterized in that: Multiple annular support mechanisms (2) are installed on the inner side of the underpass pipe (1). Two support monitoring mechanisms (4) are installed at the bottom end of each annular support mechanism (2), and two tensioning and anti-deviation mechanisms (3) are installed at the top end of each annular support mechanism (2). The two tensioning and anti-deviation mechanisms (3) and the support monitoring mechanisms (4) are symmetrically installed relative to the annular support mechanism (2). The annular support mechanism (2) includes a support ring (201), and the bottom end of the support ring (201) is fixedly installed. There is a sealing head (203), and an arc-shaped partition strip (202) is installed below the sealing head (203); the support monitoring mechanism (4) includes an inclined support leg (401), and an installation channel (402) is provided on the inner side of the inclined support leg (401). An installation sleeve (403) is installed on the inner side of the bottom end of the installation channel (402), and a pressure sensor (404) is installed on the inner side of the installation sleeve (403). A transmission head (405) is installed on the lower end face of the pressure sensor (404).

2. The settlement control structure based on a shield tunnel foundation as described in claim 1, characterized in that: Multiple ring support mechanisms (2) are arranged linearly along the axis of the underpass pipe (1). The underpass pipe (1) is fixedly connected to multiple support rings (201). Both ends of the arc-shaped separator (202) are fixedly connected to two adjacent inclined support legs (401). A grouting cavity is provided between the bottom end of the support ring (201) and the arc-shaped separator (202).

3. A settlement control structure based on a shield tunnel foundation as described in claim 2, characterized in that: The tensioning and anti-deviation mechanism (3) includes a sealing plate (301), and a plurality of anchor rods (302) are installed on one side of the sealing plate (301). Each anchor rod (302) consists of a rod body (303) and a plurality of limiting rings (304).

4. A settlement control structure based on a shield tunnel foundation as described in claim 3, characterized in that: Multiple limiting rings (304) are fixedly fitted on the outer side of the upper end of the rod (303). The bottom end of the rod (303) passes through the lower pipe (1) and the support ring (201) and is in close contact with the sealing plate (301). The rod (303) and the support ring (201) are fixedly connected by the sealing plate (301). The multiple limiting rings (304) are arranged linearly along the axis of the rod (303).

5. A settlement control structure based on a shield tunnel foundation as described in claim 4, characterized in that: The inclined support leg (401) is fixedly connected to the support ring (201), and the inclined support leg (401) is threadedly connected to the mounting sleeve (403). The bottom end of the pressure sensor (404) is provided with a contact. The upper end of the transmission head (405) passes through the mounting sleeve (403) and is fixedly connected to the contact. A sealing ring is provided between the transmission head (405) and the mounting sleeve (403).

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